#include <iostream>
#include <Eigen/Dense>

using namespace Eigen;
using namespace std;

int main() {
    MatrixXd m = MatrixXd::Random(3, 3);
    m = (m + MatrixXd::Constant(3, 3, 1.2)) * 50;
    cout << "m = " << m << endl;
    VectorXd v(3);
    v << 1, 2, 3;
    cout << "m*v = " << endl << m*v << endl;
}
